Large sliding door cabinet

Featured here, in the second picture down on the left:

http://www.luckettstore.com/fresh-off-the-wagon

I am in love with this! I want it!

I kind of have a plan in my head, book case, top, bottom and sides deeper then shelves. But how are those sliding doors mounted?

Do they run on a rail in the top and bottom? with concave grooves in the top/bottom of the door frames? Must be an easier way. =)

And how to make the doors, light weight? yet still able to withstand minor hits.

I was going to do something else for my first build, but I really, want this. (how odd for me to say that, lol)

After looking as close as possible at the pic, they do have that telltale runner on the bottom, but i dont see anything at the top, it just looks flat.

I found one of these at the worldmarket website, but it was much narrower, however, it had the same black holes/pulls in the doors.

I have a router (for years) but never used it, I suppose you could make the channel by stacking different dimensional lumber, leaving a center channel.